html, body, #map{
  padding: 0;
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}
#copyright{
  position: absolute;
  bottom: 10px;
  left:calc(50% - 200px/2);
  width: 200px;
  line-height: 30px;
  text-align: center;
  background: white;
  box-shadow: 1px 2px 1px rgba(204, 204, 204, 0.8);
  border-radius: 3px;
  z-index: 9;
}